Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Hydrolysis of Hydrazine-crosslinked PAN Particles and Their Moisture-absorbing Heat Release Property

히드라진 가교 PAN 입자의 가수분해 및 흡습발열 특성

  • Yang, Dae-Hyuk (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Park, Heung-Su (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kim, Young-Ho (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 양대혁 (숭실대학교 유기신소재.파이버공학과) ;
  • 박흥수 (숭실대학교 유기신소재.파이버공학과) ;
  • 김영호 (숭실대학교 유기신소재.파이버공학과)
  • Received : 2012.01.06
  • Accepted : 2012.02.06
  • Published : 2012.02.28
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Abstract

Polyacrylonitrile (PAN) particles synthesized by dispersion/emulsion polymerization of acrylonitrile monomer were cross-linked with hydrazine in order to prevent its dissolution in water when they were subjected to hydrolysis. Hydrazine-crosslinked PAN (cPAN) particles were hydrolyzed with NaOH solution in order to impart them with high hydrophilicity. The effects of the cross-linking degree, i.e., the hydrazine concentration during the cross-linking of PAN, NaOH concentration on the hydrolysis behavior of cPAN particles and their particle shapes were analyzed. Results revealed that cross-linking of PAN with 5% hydrazine solution at $110^{\circ}C$ for 3 hours and hydrolysis of cPAN with 5% NaOH solution at $80^{\circ}C$ for 3 hours is suitable for the preparation of highly hydrophilic and water-insoluble PAN particles. Then, hydrophilicity and the heat release property of the hydrolyzed, cross-linked PAN (h-cPAN) particles were examined. The h-cPAN particles exhibited a temperature rise of up to $11^{\circ}C$ by water absorption and a moisture regain of up to 23% at $20^{\circ}C$ and 65% RH, depending on the hydrazine cross-linking and NaOH hydrolysis conditions. Cotton fabrics were treated with h-cPAN dispersion solutions of different concentrations by a normal pad-dry process. The temperature changes of the treated fabrics by water absorption were measured. The h-cPAN treated fabrics showed higher temperature rise by moisture absorption compared to untreated one. It indicates that the particles can be used as a potential moisture-absorbing heat release finishing agent for textiles.

Keywords

References

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